Current Scaling Of The Magnetoresistance Peaks In The Microwave Radiation Induced Magnetoresistance Oscillations And Temperature Effect On Interaction Between Microwave Induced Oscillation And Current Induced Giant Magnetoresistance.

This dissertation is based on the magnetotransport study of the 2DES in GaAs/AlGaAs heterostructure. There are two separate studies presented in this dissertation. The first study focuses on the study of the microwave induced resistance oscillations in presence of supplementary direct current ( I_DC). Our works find that the peak height of the microwave induced magnetoresistance oscillations in high mobility GaAs/AlGaAs two-dimensional electron system (2DES) are progressively reduced by applied direct current ,I_DC, over the temperature range 0.35K – 1.25K and I_DC also produces an overall giant magnetoresistance. A “universality” or similarity in the decay of the magnetoresistance peak height across varying temperatures T, channel width W and applied I_DCwas observed. The results suggest that the resistance maxima scale with current densityj_DC=I_DC/W rather than the I_DC and indicate that the bulk current is maintained at the photo-excited magnetoresistance peaks in the photo-excited 2DES. On the other hand, the oscillatory minima show limited sensitivity to I_DC . The second study focuses on the mutual influence between current induced giant magnetoresistance (GMR) and the microwave radiation induced oscillations in various temperatures. This study demonstrates that a dc-current, I_DC,tunable giant magnetoresistance can exist together with radiation-induced magnetoresistance oscillations in the GaAs/AlGaAs two-dimensional electron system. Both effects are decoupled and can be separated in a Drude multi-conduction model. The result suggests that the introduced I_DC, reduces the overall diagonal conductivity, diminishes and eventually eliminates the conductivity peaks at the oscillatory maxima. This behavior, captured using a two-term Drude model, shows that the fit parameter σ_1 decreases with increasing I_DC, even reversing sign, indicating a transition from positive to negative magnetoresistance. The crossover current increases with temperature. At high I_DC, σ_1 shifts from negative to positive as temperature rises from 0.35 K to 1.25 K, suggesting temperature-dependent reversal of negative magnetoresistance.Ph

Exploring the Social Dynamics of Health Information Sharing on Social Media: The Influence of Beliefs and Source Information

In the age of online connectivity, understanding how health information circulates in social media communities is vital to navigate online health complexities, fight misinformation, and make informed decisions. This study examines the impact of topic belief groups and source information on the sharing process regarding dietary topics like vegetarianism and meat-eating. 129 undergraduate students from two US universities participated in this study. After assessing their prior topic beliefs about vegetarianism and health, participants were randomly assigned to a 'Sources Present' or 'Sources Absent' condition. Subsequently, they read 30 text excerpts regarding vegetarianism and meat consumption, rated their likelihood of sharing each information on social media and provided open-ended justifications for their choices. Quantitatively, belief groups significantly influenced pro-meat sharing, but not pro-vegetarian sharing, with no notable interaction between belief group and source presence. Qualitatively, nine themes emerged influencing sharing decisions, with the prevalence of some themes varying based on source conditions. By exploring these factors, this study seeks to enhance digital health literacy, foster an informed and engaged online society, improve public health communication, and combat misinformation, leading to improved health outcomes in the digital era and beyond.Master of Public Health (MPH)Public Healt

Investing in Remote Patient Monitoring to Improve Chronic Heart Condition Outcomes

Prior research has provided evidence that, on average, Remote Patient Monitoring (RPM) has a beneficial impact on hospital and patient outcomes. However, hospital investments in RPM have significant variation in effectiveness and only a few studies have examined the drivers and manifestations of these heterogeneous effects. Thus, RPM is an excellent case to better understand heterogeneity in adoption and outcomes of health IT as well as theorize the conditional nature of the effectiveness of a relational IT that connects firms, hospitals, and patients. Against this backdrop, this two-essay dissertation uses traditional econometric methods and causal machine learning to examine how different combinations of hospital and regional (county) characteristics condition RPM-related outcomes from a hospital and a patient point of view. The first essay offers a comprehensive understanding of how the outcomes associated with a relational health IT are conditional on a number of internal and external characteristics, whereas the second essay demonstrates multiple ways to identify and address the digital divide gap in outcomes across patient populations and the value of matching resources to patient subgroup needs. As a contribution to IS investment theory, the dissertation further considers the findings across the two essays to propose a conditional search mechanism that can help organizations maximize their return on IS investments. Overall, this research has important implications for policymakers deciding how to incentivize and support hospital adoption of RPM and for health care providers designing strategies for adoption and use of RPM for patients with heart failure.Doctor of Philosophy (PhD)Computer Information System

Intentional Disengagement: Decoupling Engagement And Performance During Massive Organizational Change

This dissertation investigates the phenomenon of intentional disengagement as a strategic employee response to massive organizational change, with a particular focus on mass layoffs. Drawing on the Job Demands-Resources (JD-R) model (Xanthopoulou, Bakker, Demerouti, & Schaufeli, 2007) and Punctuated Equilibrium Theory (PET) (Gersick, 1991), this qualitative, embedded, multiple-case study challenges traditional assumptions that engagement and performance are positively correlated under all conditions. Through in-depth interviews with both managers and individual contributors at large corporations who were retained and not retained during periods of mass layoffs, this study uncovers how individuals recalibrate their relationship with work and self during sustained periods of significant instability. Findings reveal that during times of massive organizational change, even high performers may intentionally disengage from portions of their role, while maintaining or improving performance through boundary-setting and role prioritization. Thematic analysis, completed with NVivo coding, illustrates that intentional disengagement is not apathy, but a form of adaptive resilience. This research contributes to the theoretical evolution of the JD-R model by introducing workplace stability as a critical moderating variable, decoupling engagement and performance, and proposing intentional disengagement as a viable response to psychological contract violations. Practical implications underscore the importance of leadership transparency, role clarity, and psychological safety in sustaining performance during periods of transformation. This is the foundation to begin studying how intentional disengagement can be used as a mechanism to refocus time and energy away from that which is out of a person’s locus of control and towards things which will move them higher and farther than they would have been had they maintained their level of engagement throughout the PET events, which is massive layoffs in this study.DB

Linguistic Landscape in Elementary Schools in Atlanta; A Case Study

This thesis research investigates the linguistic landscape in elementary schools in Atlanta while analyzing the visual representation of language in school spaces and their impact on linguistic inclusivity, identity formation and cultural representation. This study examines classroom signs, hallway posters, school’s bulletin boards, among others. with the aid of qualitative content analysis, photographic documentation and teachers’ perception to assess the presence and visibility of different languages. The findings reveal English, Spanish and French as the dominant languages, while other languages, such as Chinese, Arabic, German and others are absent in the school signage. The research further examines institutional policies, social hierarchies, and cultural diversity, which influence language choice in school’ spaces. The study suggests that when the diverse linguistic landscape is presented, it can foster a sense of belonging for learners from diverse backgrounds and support language learning. The research concludes by recommending policy adjustments to enhance multilingual representation of school environments and inclusion in Atlanta’s elementary schools.Master of Arts (MA)World Languages and Culture

Heaven is Hard Work: The Nation of Islam's Economic Philosophy, Program, and Voices from the Pioneers, 1930-1975

Elijah Muhammad led the Nation of Islam (NOI) from 1934-1974 and propelled it as an organization to help black people in America fight economic oppression. Muhammad urged black Americans to accept Islam and create a “heaven on earth” by developing and executing an economic program in which several business enterprises opened in major cities. Muhammad encouraged members to adhere to a strict moral code that included working hard and saving money. Some NOI members worked within the movement’s enterprises and others opened their own businesses. This manuscript surveys the Nation of Islam’s economic program in Atlanta, Chicago, and New York under Muhammad’s leadership. This work also extracts and contextualizes over twenty testimonials from the pioneers or NOI members who participated in the economic program between 1930-1975 primarily from interviews conducted by the author as well as accounts found in the NOI’s newspaper, Muhammad Speaks. Findings reveal that the NOI’s economic program helped some pioneers develop an identity, improved their work ethic, provided a way out of economic oppression, and made them economically self-sufficient.Doctor of Philosophy (PhD)Histor

From Re-Carceration to De-Carceration: An Analysis of Alternative Measures to Recidivism

Across criminal justice research, there is one key measure that is central to evaluating sentencing policies, rehabilitation programs, and the impact of criminal justice interventions: recidivism. Despite its prevalence, recidivism exhibits alarming inadequacies as a measure of post-release success through methodological inconsistencies, a theoretical misunderstanding of rehabilitation, and the reinforcement of systemic challenges. Relying on it as a success measure greatly impairs effective decision-making within the criminal justice system. In response, scholars have made calls to action to implement criminal desistance as an alternative. Theories of criminal desistance offer a refreshing new perspective on post-release success, focusing on the gradual process individuals undertake toward the cessation of criminal activity and utilizing a wider array of data across multiple life domains. In this exploratory analysis, I create a quantitative measure of criminal desistance and test it against traditional recidivism measures to evaluate its theoretical and quantitative capabilities.Master of Arts (MA)Sociolog

“All we ever see of stars are their old photographs”: An Archetypal Comparative Analysis of Alan Moore’s Watchmen with Robert Kirkman’s Invincible and Garth Ennis’ The Boys

This thesis conducts a comparative analysis between Alan Moore’s 1986 graphic narrative Watchmen with that of Robert Kirkman’s Invincible graphic limited series as well as Garth Ennis’ The Boys graphic limited series. In conducting this analysis, I examine archetypes coined by Van Ness during her examination of Watchmen. Additionally, I coin my own archetype of “The Anchor,” characters typically without powers or super abilities that serve as a grounding force and source of empathy for the cast. My aim is to highlight each of these respective narratives’ prioritization of empathy and emotional intellect over the typical conflict resolution involving panels of fantastical fight scenes between superheroes and their respective villains ad nauseum. I also interact with literature’s inherent ability to infuse readers with empathy that encourages prosocial actions through Moore, Kirkman, and Ennis’ flawed and realistic characters meant to parody the superheroes familiar with general audiences

Organizational Culture and Social Integration in Nursing Homes

Social isolation is a prevalent issue among nursing home residents, which can lead to various chronic diseases, such as depression, dementia, and chronic pain. Social integration refers to the active engagement in social ties, institutional connections, and participation in community-based social, cultural, and religious activities. Organizational culture is a critical factor in providing person-centered care and fostering communication, teamwork, and quality improvement processes. The study examines organizational culture specifically in terms of person-centered care practices and social integration, social isolation, and loneliness among residents. The study adopted a descriptive study design to understand the context of organizational culture and social integration among nursing home residents. The was guided by the following research questions: how do staff perceive that they influence the social integration of residents, what person-centered practices are currently in place to support reducing social isolation and loneliness and how does the transition to private rooms in the nursing homes setting impact residents perception on social isolation and integration. The study aims to identify areas of organizational culture and person-centered practices that could be improved and, in that context, better understand the social health of residents. The study includes targeted recommendations for promising practices that will support the entire community of workers, families, and residents.Master of Arts (MA)Gerontology Institut

Rise of Manufacturing: Essays in Urban Development and Economic Policy

This dissertation examines the rise of manufacturing employment in the United States since 2010 and explores its implications for low-skilled and minority workers, urban neighborhoods, and regional economic policy. Once dismissed as a declining sector, manufacturing has seen notable growth among low-skill and minority workers. Through three essays, this dissertation investigates the dynamics of that growth and its broader significance for equitable economic development. The first essay analyzes national trends from 2010 to 2022 within manufacturing using data from the U.S. Census and the Bureau of Labor Statistics. It identifies key subsectors driving manufacturing's resurgence while also detailing how this growth has disproportionately benefited low-skilled, Black, Hispanic, and Asian workers in terms of both employment numbers and wage gains. It finds that advanced manufacturing, contra to expectations, saw growth for low-skilled workers but very little for high-skilled. Finally, this research shows that manufacturing grew across many regions, regardless of initial manufacturing strength. The second essay focuses on low-income neighborhoods within the urban ring of the Atlanta region with the goal to determine whether increases in local manufacturing employment positively affects employment outcomes. Using a time-series panel dataset, the essay finds that compared to other sectors such as retail, healthcare, and food service, manufacturing did show greater positive effects for these communities, highlighting its potential as a vehicle for inclusive economic development. The third essay shifts focus to evaluate recently launched Build Back Better Regional Challenge (BBBRC), a federal program by the Economic Development Agency that awarded funding to 21 regional coalitions to build out industrial clusters for equitable development. Through examining the different proposals along with the program charter, this essay examines how this place-based program varied in its geographic focus and manufacturing industry showing the flexibility and scope in attempting to achieve equitable development. Altogether, these essays argue that manufacturing is not only experiencing a meaningful revival but can also serve as a key component for inclusive growth. As policymakers continue to look for ways to revitalize marginalized communities, this research suggests that manufacturing offers potential avenue for equitable development.Ph